Plan B or overthinking?

My boyfriend and I were having sex and I was on top. He was about to come and when I sat up I saw the condom was still in me. He grabbed it out of me and I was worried if he came in me. He said that it mostly got on bed. I’ve never had anyone come inside me so I don’t know how it feels and when I stood up nothing came out of me nor did anything come out once I went to the bathroom. So I just not sure if I should get a plan b or if I’m just being an over-thinker???? I should mention that I am on the pill and I missed Friday due to traveling, but still took one this morning (Saturday) to get back on track. Please help!